Found printed circuit board had 2 compoments that had over heated and lost connection with board. Tried soldering but no luck ran 22 gage copper wire fron each component to next. Serial number of unit is 229zh14239. Unit now seems to be working. Gives heat when ask for and shuts off at t-stat.also starts with t-sate. Question could the transfomer be going bad which caused this or is there an other problem? Also where can I find part number for printed circuit board?